Solar flares on December 31, 2013
The most powerful solar flare in 24 hours
M6.4 (strong) flare - December 31 at 2:58 PM
Solar activity index
Value as of the end of the day on December 31, 2013
Solar X-ray emission over the past 2 days
Chart of solar X-ray emission (1-8 Å) from December 30, 2013 to December 31, 2013
Time zone — UTC-07 (Denver)
List of solar flares for December 31, 2013
The total number of solar flares of class C and higher — 8 flares
C class — 7 | M class — 1 | X class — 0
| Class | begin | max | end | region |
|---|---|---|---|---|
| C2.1 | 23:45 | 23:49 | 23:52 | 1944 |
| M6.4 | 14:45 | 14:58 | 15:20 | 1936 |
| C2.9 | 12:49 | 12:53 | 12:56 | 1940 |
| C4.0 | 11:53 | 11:59 | 12:03 | 1940 |
| C1.8 | 11:20 | 11:25 | 11:31 | 1936 |
| C2.0 | 09:42 | 09:49 | 09:55 | 1938 |
| C8.8 | 03:23 | 04:50 | 05:32 | — |
| C2.2 | 00:33 | 00:40 | 00:47 | 1936 |